package com.wheat.system.mapper;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

/**
 * @author wheat on 2019/12/2.
 */
//@Mapper
public interface DateBaseMapper {

    @Select("select login_name from sys_user where user_id = #{user_id}")
    String query(String user_id);
}
